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Message-Id: <20070604.212417.08667756.davem@davemloft.net> Date: Mon, 04 Jun 2007 21:24:17 -0700 (PDT) From: David Miller <davem@...emloft.net> To: mchan@...adcom.com Cc: andy@...yhouse.net, netdev@...r.kernel.org, jd@...junkt.com, cat@....com.au Subject: Re: [4/5][BNX2]: Fix occasional counter corruption on 5708. From: "Michael Chan" <mchan@...adcom.com> Date: Mon, 04 Jun 2007 17:01:08 -0700 > [BNX2]: Fix occasional counter corruption on 5708. > > The statistics block DMA on 5708 can be messed up occasionally on the > average of about once per hour. If the user is reading the counters > within one second after the corruption, the counters will be all > messed up. One second later, the counters will be ok again until the > next corruption occurs. > > The workaround is to disable the periodic statistics DMA. Instead, > we manually trigger the DMA once a second in bnx2_timer(). This > manual trigger of the DMA avoids the problem. > > As a consequence, we can only allow 0 or 1 second settings for > ethtool -C statistics block. > > Thanks to Jean-Daniel Pauget <jd@...junkt.com> and > CaT <cat@....com.au> for reporting this rare problem. > > Signed-off-by: Michael Chan <mchan@...adcom.com> Applied. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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